Bitcoin (BTC-USD) retreated once again Monday to kick off a fresh week of losses after the cryptocurrency suffered its biggest weekly decline since January.

Bitcoin, along with other major cryptocurrencies ripple (XRP), ethereum, bitcoin cash, stellar, and litecoin, have fallen again over the last 24 hours as investors and traders fret over a flood of warnings on the future of cryptocurrencies.

Bitcoin’s no longer boring.

After months of tranquility that became the envy of equity investors, The biggest cryptocurrency roared back into the public consciousness this week with the biggest sell-off since August, another fork and a cameo in a major semiconductor earnings report. Some digital asset industry pundits have already begun referring to it as the crypto winter.

Hedge funds aren’t giving up on cryptocurrencies just yet.

"The best solution is I have a key, my partner has a key, and some guy that I've never heard before has a key," said Travis Kling, co-founder of Ikigai Asset Management, a hedge fund that uses BitGo in this way.

Bitcoin, the largest crypto, is down more than 70% from its all-time highs set at the end of 2017, as regulators look to clamp down on exchanges and tech companies shun advertisements related to the nascent digital coin market. But Wall Street's enthusiasm for crypto has not been dampened.

Travis Kling, a former portfolio manager at Steve Cohen's Point72 hedge fund, is starting his own cryptocurrency venture, a person familiar with the matter told Business Insider.