And for the altcoins, after buying altcoins, what happens if no one wants to buy them from you? You know a lot of altcoins aren't all that popular so how do people even sell off their altcoins? Can you even hodl altcoins?
Investing in bitcoin is a storing value, your money will
Be safe and you will get value of what you invested since inflation will hardly affect your savings because the future we see in bitcoin.
On altcoins, if you buy altcoins with low liquidity, you may not be able to sell them, but if altcoin is listed in any were be it an exchange or on a smart chain like BSC, ETh or any other one, you can easily sell them the way you buy them. The only difference with bitcoin is that, altcoins have teams control the project which can be broken through one or two misunderstandings, while bitcoin is decentralized and no one can temper with it.
Nobody can predict the future and you never know what can happen. Crypto is very volatile and while we are in a bull market right now, it can quickly change. I am cashing out a part of my crypto when certain numbers are hit but already made sure that I got my investment back.