The other day I've found this interesting blog about someone in Europe planning to retire early by converting a fixed amount of their monthly salary into Bitcoin.
He started doing this in the bull market of 2017 and keeps doing it every month, no excuses. A specific amount, 500 euros, is always converted into Bitcoin and stored away in cold storage.
This is how his strategy looks like:

If we make use of the opportunity in making savings, we could be more better than the same people whom we started together with and they chose fiat to make their own investment in, bitcoin could be a lifetime investment plan that is more better to use than fiat, because the money invested could have the opportunity of rising, there's more advantage in making the right decision as well as when we realized investing our pension on bitcoin.