I think your question is a reflection of the fact that a lot of people didn't think before they jumped into the crypto investment game. These are very high risk investments, and it would be unwise — no matter how tempting — to be dependent on them for your source of income for living. What goes up so suddenly, must also come down... and if you look at a historical chart of BTC, you'll see that there were LONG "down periods" after each new spike to a high.... but I think a lot of people ignored that.
In my case, I would sell a bit at a time... and thankfully I have other works I make a living from.