Source: https://cryptopotato.com/nym-the-worlds-first-generic-incentivized-mixnet-releases-its-whitepaper/

Historical data shows that it is nearly impossible to consistently predict Bitcoin’s price action and many traders that attempt this end up losing money. Now that Bitcoin trades near $50,000, the ultimate goal for most traders is to hold on to their current holdings and incrementally add to them in a way that is not terribly risky. 

Options strategies provide excellent opportunities for traders who have a fixed-range target for an asset. For example, using leveraged futures contracts might be a solution for a scenario where one expects a price increase of up to 28% over the next month. Of course, using a tight stop loss lessens the viability of the trade.

On the other hand, using multiple call (buy) options can create a strategy that allows gains that are four times higher than the potential loss. These can be used in both bullish and bearish circumstances, depending on the investors’ expectations.

The long butterfly strategy allows a trader to profit from the upside while limiting losses. It’s important to remember that options have a set expiry date; therefore, the price increase must happen during the defined period.

The Bitcoin (BTC) calendar options below are for the March 26 expiry, but this strategy can also be used on Ether (ETH) options or a different time frame. Although the costs will vary, its general efficiency should not be affected.

The suggested bullish strategy consists of buying 1 BTC worth $48,000 call options while simultaneously selling double that amount of $56,000 calls. To finalize the trade, one should buy 1 BTC worth of $64,000 call options.

While this call option gives the buyer the right to acquire an asset, the contract seller gets a (potential) negative exposure.

As the estimate above shows, if BTC is trading for $48,700, any outcome between $49,380 (up 1.5%) and $62,630 (up 28.6%) yields a net gain. For example, a 10% price increase to $53,570 results in a $4,000 net gain. Meanwhile, this strategy’s maximum loss is $1,350 if BTC trades below $48,000 or above $64,000 on March 26.

This allure of this butterfly strategy is the trader can secure a $4,050 gain, which is 3x larger than the maximum loss, if BTC trades from $53,550 to $58,460 expiry.

Overall it yields a much better risk-reward from leveraged futures trading considering the limited downside.

The multiple options strategy trade provides a better risk-reward for bullish traders seeking exposure to BTC’s price increase and the only upfront fee required is the $1,350 which reflects the maximum loss if the price is below $48,000 or above $64,000 at the expiry date.

The views and opinions expressed here are solely those of the author and do not necessarily reflect the views of Cointelegraph. Every investment and trading move involves risk. You should conduct your own research when making a decision.

Source: https://cointelegraph.com/news/this-bullish-bitcoin-options-strategy-lets-traders-speculate-on-btc-price-with-less-risk

The latest “evil contract” exploit has netted an attacker over $14 million in stolen funds. 

Furucombo, a tool designed to help users “batch” transactions and interactions with multiple protocols at once, fell victim to the attack which centered on token approvals from users.

The attacker’s address currently has $14 million worth of various cryptocurrencies, but the attack appears to be larger as they have been transferring ETH to privacy mixer Tornado Cash in batches over the last hour.

This attack is conceptually similar to the $20 million “evil jar” attack that struck Pickle Finance last year, as well as the $37 million “evil spell” exploit that hit Alpha Finance earlier this month. In these “evil contract” exploits, an attacker creates a contract that fools a protocol into believing it belongs there, giving them access to protocol funds.

So what happened to Furuсombo

An attacker using a fake contract made Furuсombo think that Aave v2 has a new implementation.
Because of this, all interactions with ‘Aave v2’ allowed transfers approved tokens to an arbitrary address. pic.twitter.com/gQVxJqiAmL

— Igor Igamberdiev (@FrankResearcher) February 27, 2021

In this case, the attacker ‘tricked’ the Furucombo protocol into thinking that their contract was a new verison of Aave. From there, instead of draining funds from the protocol as in previous evil contract exploits, the attacker instead leveraged the ability to transfer the funds of every user who had given the protocol token permissions. 

“Infinite permissions means you can wipe everyone who interacted with Furucombo,” said whitehat hacker and co-founder of DeFi Italy Emiliano Bonassi in a statement to Cointelegraph.

This type of exploit appears to be growing increasingly popular, now accounting for over $70 million in user funds lost in just a few months.

The team confirmed the attack in a Tweet, saying that they “believed” they’d mitigated the exploit but recommended revoking permissions “out of an abundance of caution:”

Today at 4:47 PM UTC the Furucombo proxy was compromised by an attacker. We have deauthorized the relevant components and believe the vulnerability to be patched but we recommend users remove approvals out of an abundance of caution.

— FURUCOMBO (@furucombo) February 27, 2021

Users can leverage tools like revoke.cash to do so. 

The attack comes during a period of wider reflection in the DeFi world on security and the utility of auditing companies. In the last three months, three different auditing and code review services have emerged, each with a different incentive model designed to encourage more thorough and dynamic security practices.

Source: https://cointelegraph.com/news/transaction-batching-protocol-furucombo-suffers-14-million-evil-contract-hack