I think if one invests in the long term, then at any time one can buy bitcoin or any other cryptocurrency. Whether or not the decision to invest in bitcoin is wise or not, it really depends on the timing and investment strategy of each. So before starting to invest, it's better to first understand technical analysis and estimate when to enter and exit the market so that we don't panic buy or panic sell.
Crypto experts expect Bitcoin gradually return to its previous position. Yesterday Bitcoin price was around $23000 but now it is more than $24000. Bitcoin is still in a buy prices. But after few days later it may reach $28000 then many may regret. I think investing in Bitcoin will never be lose. But I will definitely advise my friends to invest in Long-term.