I don't think that BTC could die ever. And if yes, whether people stop to use other cryptos? No, they don't. Maybe will arise a little panic in crypto generally, but the crypto world will exist on. Nowadays people know about other cryptos which are better for daily use. Among my favorites ranks IOTA with his revolutionary DAG technology. No fees, No waiting for a long time for a confirmation from miners, no forks = no fakes cryptos, no confusing in the future similar like by the BTC forks. No-limited transactions per a second. No scalability problems. Better security system etc. And therefore IOTA and his DAG technology are revolutionary. And people will start to use some of these cryptos instead of BTC to the daily transaction very soon in my opinion, but the BTC will live on.