Do not wait any longer, as long as you understand how crypto works and behaves, and finally ready for a roller coaster ride then invest now.
Wow! Seems you're having a hard time to find answer for this one . IMO, anytime is the right time. You can buy when btc is on its blood bath, you can buy on its ATH, you can buy today, tomorrow, next week etc. Only remember that you should only sell on its higher price — as much as higher to the point of buying. Buy low, Sell high is the simple logic of creating profits. Well,  if you really want to maxime the profit you could get in the future then buy on its ATL and sell when it skyrockets. But of course not all of us have plenty of time waiting for that opportunity so focusing on selling when we already created small profits was fine already. Sometimes we should learn to forbid ourselves for being greedy .