I think constantly buying bitcoin is the smartest thing you can do. Not buying with all your money tho, like savings account, accumulate bitcoin monthly. For example buying 100$ worth of bitcoin every month (or whatever you can afford, 100 is just an example) you can definitely break even and profit.

For example any person who has been doing this method for the past 3 years would have made insane profits now. If you have started last year to this day yes it wouldn't make you rich and even lose money a bit but at least you would drop the cost average with the low price days as well. Better than buying bitcoin at once all together.