I am not even kidding, TRC20 is my favourite one right now. It is almost instant and it is nearly free, in some cases it's literally instant and it's free. I understand that Tron as a coin itself is not a good one, and I have never really invested into Tron before, and because it is nearly free, people do not need to buy Tron and that means the price of Tron doesn't really go high because of it.
However, that doesn't change the fact that if you want to move money around, it is by far the best one. It is also as decentralized as it can get, maybe not as much as bitcoin, but it is not centralized like xrp or bnb neither so it's somewhere in between. Never seen any big security questions about it neither, so for me that is still the best one out there.
I know you are really serious, Tron is a network that was once very popular because of its high speed and low cost, it is the favorite blockchain platform for entertainment and gambling Dapps. USDT on Tron is extremely popular, especially when the USDT transaction fee on Ethereum is very high. Recently, Tron also introduced a plan to develop Bitcoin Layer-2 solution, I am waiting for more information about it. Justin Sun always knows how to follow the trend in the market effectively.
Although the TRX token price did not create a new ATH in 2021, its recovery over the past year has been really impressive and is about to reach its ATH of 2021. This is something that many top coins have not been able to achieve such as DOT, ADA, ATOM, DOGE, XRP... From an investment perspective, TRX is also a potential investment for those who believe in the future of Tron.