Knowledge, patience and courage play a very important role in investing in any cryptocurrency, not just Bitcoin.
Not just any cryptocurrency but bitcoin to be specific, and let not be deceived thay by hodling any crypto like we are to hodl bitcoin that we can be sure to make profit, we could be holding a bag of worth nothing.
I think for altcoins just like investing in bitcoin knowledge here does applies for both but we shouldn't be courageous to the extent that we have to invest in with amount we cant afford to lose especially for altcoins. As for bitcoin you could be patient for a circle or two and be sure of raking in some profits but altcoins has more tendency of dumping than it gives profit in the long. For altcoins always take profits where opportunity is open and don't be greedy.
I understand your message about how it's more reliable to buy and hodl Bitcoin other than any other cryptocurrency but that doesn't take away the fact that just like Bitcoin, there are other coins that can as well be bought and HODLed which at the end returns a huge amount of profit and that's where the knowledge factor comes to play. With the right knowledge about some other coins, an investor can as well make good fortunes by investing in coins like Etherum, BNB, Solana and XRP. So you can't just limit long term investment on Bitcoin and totally condemn doing same in other coins that's proven to be reliable in buying and HODLing
Understandably I do get the hint you're making but for someone like me I will always put bitcoin above all of those coins you mentioned above and my reasons are that despite you claim to say these coins have proven some reliability which am not totally buying into, I don't think any of them could be as reliable as bitcoin. The centralized feature they possess is enough red flag to be very watchful and cautious about. I don't totally condemn hodling those coins if anyone so desire but my take here is you don't put in so much that could burn you.