I've read all the replies of OP and I can see he always uses the word "future".
Here is the other thing. If i have usdt/usdc on the tron network... what if i cant sell that in the future?
Is there a concern if I cannot trade the usdt/usdc though in the future
You are going long-term so just pay the transaction fees in Bitcoin. That's the best possible option you could get rather than putting it in many baskets that would just stress you again about transaction fees if you want out.
It will just confuse you checking on each altcoins or stablecoins that you purchased and then having doubts about something else.
It's giving you a headache now, what more in the future?