I think the Binance Smart Chain (BSC) is the best for moving ALTS tokens because I have a little analysis for the smartcontracs network, including:
-erc20 is the blockchain of Ethereum and has more community tokens than others and is widely used but the transaction fees are high.
-trc20 is a blockchain from TRON and has a fairly large community and the fees are cheap but seeing the marketcap from TRON continues to decline, now it is at number 28 Coinmarketcap.
-bep20 is the newest blokchian from Binance with quite a number of new community tokens,development token and even airdrops, DEX Swap, the centralized exchange is now dominated by the platform from Binance.
So, I think it's better to choose Binance's BEP20 to move ALTS, rather than to TRC20 from TRON. And we can see if BNB is number 3 in Coinmarketcap and Binance.com is number 1 Centralized EXchange in the world . IMO