You can’t know.
Well perhaps you could if you subscribe to the knowledge base of technical analysis > fundamental analysis.
In which case, invest when 9EMA > x while volume < 300 after x before I go out for breakfast but only if someone buy 2 BTC after selling 1 WETH.
That’s my algo to know when to buy BTC.
But srs, the best time is whenever you want. It’s a great store of value when compared orignal FIAT.
