On the contrary, if bitcoin disappears, and when it disappears, people will find a substitute for it or a alts or a completely different mechanism.Though it may sound impossible, it may be possible depending on the damage of it to certain countries in terms of economic impact.
I beg to differ, Bitcoins is the reason people come to crypto world, no bitcoins no one will care for alts. Alts are a waste of time and they'll disappear for sure. I feel Bitcoins has caught everyone attention and they should just leave it asap. No need to worry about this cause the king ain't going anywhere.
People have already lost interest in alts and it's only bitcoins for now and always.