For long-term investors?
Well, just collect more Bitcoin, Bitcoin, and Bitcoin in the trusted platform. Even the platform collapsed like FTX, you can still be bale to move the Bitcoin to Binance and other trusted top exchanges.

Nowadays, Bitcoin Pirce is very crashed because of some  FUD and also incidents happened like FTX and others. But, trust me and trust everyone who suggests investing in Bitcoin, after this bearish era, there will be a Bitcoin halving and bullish era. Although there is no guarantee, we can see from the cycle so far, Bitcoin will have bright future in the bullish era. That is why it is not only about how long you are investing, but about the moment we will take the profits. Bullish era, in whenever the period, will be the best time to take profits. And the bearish era like right now is the ebst way to do DCA for collecting more Bitcininlower prices.