People do buy low too. The ones that buy high are mostly amateurs and newbies in the crypto market. Some experience traders also do this. Especially the ones that want to make some gains in a little while. Sometimes it backfires. It works for them sometimes though. When I was  a new to the market I jumped into the market when it was going up and I made some profit. I did it again, and lost big time. The simple strategy known by every experienced trader is to buy when it is low. It's safer that way.  But hey, what you see to be high today might be the low tommorow.