Any BTC price is low. 15k was low, 69k was low; 1m which we haven't seen yet, is low too. And so is 100m.

Those who bought BTC when it was $1 and have held it until now, have probably done much better than anyone trying to time the market.
There are, however, not many such people. Those who bought at $1 sold it at $10, those who bought at $10 sold at $100. Meanwhile, those who have held have made a 20000x. It's much easier and less stressful to stop watching the charts and keep holding until you stop DCAing in (a.k.a. retirement), because the ultimate value of BTC is infinity.