First of all there is a space for several (may be dozens!) BTC more with the same capitalization to form a really big bubble. Comparing to dotcom bubble, crypto's are bringing even more new stuff than Google, Oracle and Amazon from that period - generally speaking they are saving a lot of energy related to money transactions, money storage, investments and profit distribution and there really are tens of thousands things that this blockchain and dags are bringing to our life. So it is hard to predict, this bubble, will it happen or not, sure that money regulators in many leading world economies constantly calculating the possible consequences - nobody needs GD2. But answer for your question is not trivial - there are already 2-3 platforms except BTC. So possibly they can simply win the market and you will see other phoenixes than BTC after the burst.