Why do you say, anything different from Bitcoin is pure gambling. I don't understand.
You mean all cryptos are gambling games except Bitcoin? It can't be true because all cryptos follow the same movements including Bitcoin, so if they are some kind of gambles, Bitcoin is also a casino game. Hence it's a little bit useless to take those precautions with altcoins, if you are not doing the same with bitcoin because you'll face exactly the same issues at the end.
I don't quite agree with you, whilst many altcoins (not all) might somewhat follow BTC's price movement, they are not similar in any other way, the only argument of altcoins being similar with Bitcoins can only be made in terms of price movements. Having said that, majority of altcoins do not have a strong network, are centralized and also pump and dump coins, thus even if Bitcoin depreciates in price and many altcoins follow suit, not all of them rise again when Bitcoin starts appreciating, so many of them die off because they have zero use cases.
These are some of the reasons why altcoins are more or less gambling, whilst Bitcoin isn't, because Bitcoin has an actual utility and a secure network, yes the price is volatile, but it cannot go extinct, neither can a flaw occur in the network that would lead to people's funds being stolen, but these can happen to most altcoins. Even if all of these are true, people should never forget the rule of thumb of investing only what they can afford to lose.