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Better to dollar cost average then don't buy at all, look at the price of Bitcoin completely getting parabolic. Sure it may come down and have a flash crash. But if you look at the wider picture. Institutional and big companies are coming in. Grayscale invested billions of dollars, billionaire's putting 1% of their portfolio into BTC. Many other people felt they've missed the boat and looking for the opportunity to buy in. Shorting BTC now would be disastrous when price starts to take off.
I do see the bigger picture, but I do not think that we should rely too much on this institutional investors, yes they are pouring in but bitcoin is still inherently volatile so anytime the crash can happen. Also my point is that investing at this time with such a small amount is not that profitable, yes you could get the money back threefold but the highest return is what they should be aiming, it will be good for institutional investors because that threefold could drastically increase their profit. Meaning that if you have a small amount of money, you should strive for more than threefold which bitcoin could do.
"Not that profitable" is way much better than consistently depreciating. That's Bitcoin versus fiat.
When we were kids we were always told to save money. As a matter of fact, special accounts are created by banks for little children in order to instill the value of saving. Their savings are rewarded with a little over 1% of interest per annum. That's still depreciating notwithstanding the interest. A moderate amount of inflation is always around 2%.
Here comes Bitcoin. We're safer with this one. It is volatile, yes. Its price could crash anytime, yes, but it is still generally going up. So even if you are not after the profit, you may still safely park your savings in Bitcoin. Gaining a little is better than losing. Gaining sometimes is better than losing all the time.