...So if they really want to invest in bitcoin, they should learn about it thoroughly and can start investing now.
In my opinion, you can only start Bitcoin DCA at the current price if you plan to hold it for at least 10-15 years. But if we start from a 4-year cycle, then the average purchase price in this case will be lower than the current price, which may lead to a loss.
The secret thing about Bitcoin is that we don't know what is going to do next. Market traders were making all kind of predictions but I bet not many expected the market was going to reach $100k quickly and now we are here with the price trying to maintain it. We may also see more than we least expect now or later.
I'm not sure if the 4 years cycle will be a thing anymore, we haven't had bull run ever since the last one, altcoins are stuck, maybe institutional doesn't trust these cons again unlike then when everyone can make that profit in less than 4 years.