I didn't buy Bitcoin at its peak but I bought some Altcoins at its peak and I have lost 99% of its value from $10 per coin now down to $0.10+ dollars per coin but no regrets in my part because I only invested the money that I afford to lose. What will I do when the market goes up and reaches the price at the time when I bought it? Definitely, I would sell some of it if I needed money and hodl most of it. We have different kinds of "investment plans" but we are on one goal, to make our investments multiple times fold.