Which altcoins are best for small payments in terms of transaction costs and speed?
when it comes to cheap transaction cost and faster transaction only 1 comes to mind DOGEcoin. it is very fast and cheap it is the only feature it has I guess :p and it is almost present in all the major exchanges.
other than dogecoin there are some other cheap coins too like xlm(stellar). you can use it as dogecoin is not available as of now in some new growing exchanges like binance.
Many people make fun of dogecoin because is a coin that started as something funny, but at least it has something going on for it, it is fast and cheap, not much but that is enough to make it a good currency even if it is a terrible store of value but most coins do not even have that, if we take into account that most projects are abandoned in less than a year dogecoin has an advantage over most coins due to its age and its usefulness.