This is really works like for example if you bought a lot of doge last December 2020 like worth $1k and you sell it for btc last May this year when ATH reached you can have atleast 2-3 btc in your $1k yeah its a nice return and looks like most people today are doing this kind of strategy invest in alts and buy bitcoin later when they got enough profit.
It
can work, but success is highly dependant on external factors that you have no control over. Before anyone does this, they need to consider carefully how patient they are willing to be, since markets are unpredictable and can move in the opposite direction to the one you want.
As an example, people often talk abut buying the absolute cheapest coin you can find, because those have the greatest potential to increase your profits. But that's rarely accompanied with a warning about the dangers of such coins getting delisted from an exchange and the effect that tends to have on the price once it is announced. That's either a one-way ticket to bagholderville or a substantial realised loss. If you inadvertently manage to convince someone that doing this is a guaranteed win, you could end up costing them a lot of money.
Always give the pros
and cons where you can.