I bought a bunch BTC when it was $17000, then bought a bunch when it is $14000...then the price dropped until 2 days ago. I bought a bunch again when it was 6000ish...haha, now the price went up...so, really, when is it a good time to buy? When it dropped for a while and it rose a little bit, then drop again, then buy?
I think it's a pretty good strategy to buy at a bargain price to keep it selling at an expensive price to get the most important advantage is confidence and trust in patience in investing