You should also know that investing in bitcoin must be with large enough funds, in order to generate maximum profits, because the price of bitcoin is high enough, if you have small funds it is better to invest in altcoins only. you've done that, I appreciate what you did but it's just my suggestion, now what you need to do is continue to be able to add funds to make further purchases, in order to have the maximum amount, because the upgrade time is still quite long.
There are no such rules in crypto investment that if you have only small capital you will invest in altcoins and if you have huge capital you will go for Bitcoin. I don't know where you get that. Because you can buy Bitcoin using our small capital and besides, it was not only it matters on the capital on how much you possibly earn but also on how you manage it and it was still the same from investing altcoins.
It was encouraged to buy Bitcoin no matte what you have because it was a reliable investment. If we aim for less risk, then this is the best choice.