As per the analogy, when bulbs lost favour with speculators then they returned to their real function, to produce flowers.

So, some may think that the same may happen with bitcoin, we just use it for transactions. But bitcoin is a combination of currency and transaction system. Can the two be separated? Even if you could I can't see a need for a system like this.

If all you want is reliable instant transactions accepted anywhere then maybe something like apple pay is the future. Google pay anyone?