I think Bitcoin can still be used as a payment system to buy goods and as another payment, we can use it for bigger payment transactions.
there are several altcoins that are ready to replace Bitcoin, but the cost of sending will be an important factor when users choose the altcoin, for example they will send $50k at a cost that is more expensive than Bitcoin, for example $50 in sending fees, so users will prefer Bitcoin because the transaction fee is still affordable.