I agree with you that buying now is a good thing to do and it can become profitable. But I will prefer to advice people to DCA instead of buying at once. I advice some people to DCA in a a way that if bitcoin fall to a price, that they should buy more. They have been doing it since bitcoin fall to $90000. It is something that has been set on the exchange as limit order. DCA is a good thing to do.
Best thing that I've ever done, DCA makes sure that there's no regrets whenever I buy or sell at a low price and then the prices drops again because I still have money to buy at that dip again. DCA made me thousands already because I knew when to buy and the current amount of bitcoin that I have right now is probably enough capital for a small business. Although I have to say this, don't use all of your money for DCA, save some money that is quickly available to you in case of emergency, you don't want to be in a situation where you're in need of money for emergency and the price of bitcoin is going down.