Understanding from the perspective that has been carried out by many early investors who have successfully held their bitcoins since 2013, of course we are curious to know how they could forget about their investments for quite a long duration.

I mean, they buy in large quantities and forget about their investments. Because from the various Bots that I see on X, telegram or others where there are so many old wallets that have 1k btc, 2k btc and 3k btc are active again when btc reaches $100k.

Whatever it is, I am amazed by the way they run their investment in bitcoin.
First, they keep their private keys as well as possible, because they are not active for 10 years after there have been no transactions whatsoever. Second, they do not sell any btc at all at ATH 2017, 2021 but are active when they reach $100k.

For that, their accumulation strategy is at once with one purchase and forget about it.

I think it's the best step to make one option if we are satisfied with DCA and when there is big money in terms of income/bonus we can buy it all at once in another wallet and forget about it. But remember the private key must be stored as well as possible, that's the important key.