You said a lot of paragraph but to me, you didn't say anything because holding Bitcoin isn't just all that, people hold Bitcoin because it's less risky when you look at it with other altcoins and it's mor more secure but you are saying another validations. People buy Bitcoin because it doesn't depend on other coins decisions but on its own, rest assure that if you hold Bitcoin in a year after halving you are likely to get a return under standard condition of markets.

However, altcoins are very risky, you are likely to lost your money invested if you are not proactive in your research and you might get scam aside from looking at what the market altcoin does. People don't feel safe when it comes to other coins but Bitcoin win this in every aspect which is why it remained the best coin over the years cryptocurrency has been in existence.