Tbh, I wouldn't trust any Altcoin where I wouldn't be part of the dev team myself.
And the only coin that gets an exception to that rule is not an Altcoin.
Well, it is your own right to exclude altcoins. It means you will only put your money into Bitcoin. I see no problem that someone only wants to invest in Bitcoin because it is surely the most recommended coin in crypto for investment.
It's unhealthy practice to put all our money or investment on a single altcoin, we need to diversify our assets on cryptocurrency in order to increase our tendency of making more profit over them, this strategy also helps us to maximize our profit by way of reducing the risk.
Indeed. It is too risky to rely on a single altcoin. If we only want to invest in a single coin, it is better to choose Bitcoin only. There are many people who only hold Bitcoin and they can be successful. Meanwhile for altcoins, not all people who invest in altcoins, they can be successful. Especially in random altcoins or new altcoins, many people even just waste money on them.