"People can say that we are stupid and perhaps we are."

Perhaps! Perhaps not! But only a fool stays on a sinking ship.

"But the thing of it is that I feel that if I had cashed out back then, I may never have got back in fully, I would have been too scared to lose what I held."

Unfortunately it is that mentality which more often than not, has resulted in people losing everything.

I personally look at any investment as day traders do. Forget about what you paid for something (that is part of history), and instead ask yourself one basic question: Would I buy the stock or crypto today at its "current" price? If you would, then the decision is simple. Hold on to it. If on the other hand, you would not buy it today at its current price, then there should be only one logical conclusion...Sell it now!