One thing to look for in investing is for a bottom to be established when something is dropping. For instance, if bitcoin drops to $11,000, then goes up to $13,000, then back down to $11,000, then starts rising again, I would buy, because $11,000 would be established as a bottom value. The same often happens on the way up and signals a good time to sell. Many coins will be good investments soon, but you need to wait for them to show a bottom being found first, not just try to catch them as they drop.