Will upgrades to Bitcoin make Alt coins useless?
Which Alt coins will still be useful after these bitcoin upgrades?
No, altcoins 2.0 got use cases beyond payments, like smart contracts, notaries, privacy payments/balances, supercomputers, crowfunging, energy tokents, gobernance, and lot of different utilities more than simply payments. etc..
But it can be a threat to Bitcoin Cash, Litecoin, and other "simply payment" tokens... wich are mostly pumping because of BTC expensive transactions in coinbase and major FIA-2-Crypto exchanges