@laco575 think of it like this:
- The cryptocoin is the "item".
- The network is the "transportation system/method" dedicated to transporting that item.
The way I wrap my head around it is to relate to real-life. If you want to send an item somewhere, you can send via different transportation methods (air, boat, car, bike, etc). Each transportation method will have its unique characteristics:
speed (how fast the item arrives),
cost (so called "gas fees", like petrol, tolls, etc in real life), and
compatibility (just as UPS for example won't deliver a FedEx package, USDT on the Tron network won't get delivered to a USDT account on the Ethereum network).
The way to reduce the gas fees:
- Send during off-peak hours (when the network / transportation system is less busy). That would normally be nights and weekends.
- Use a crypto exchange/wallet that offers "staking" (research what that means) for USDT. Fund that account (or transfer from your cold wallet) to use both for your transactions and to separately hold a batch of USDT specifically for staking on that platform. Staking is similar to having a savings account in a bank, where the bank gets to use your money and pays you interest for that. Note that just like a savings account though, you can't use that staked batch of coins for a specified period (some services make an exception to that). Anyway, the idea is that whatever you earn from that staking, you then use against your gas fee.
And whatever you do, do not send USDT from one network, say Bep20, to the network that the recipient expects, say TRON like in your case. Again, that's like mixing up UPS with Fedex - your coins will never arrive