How long do you think will the cryptocurrency be popular? Does she substitution the usual fiat money? How many years will pass before this?
We all believe in the future of cryptocurrency, but how long does this future take? It's hard to say that because the infrastructure is not yet done, but there are many infrastructures and research and development, so after waiting for the foundation to be perfect, everything will develop very quickly.
What type of infrastructure are you waiting for? There are already many projects that have launched their net and are ready to use(lets take sonm for example, you could make workers work here since testnet which was in spring). As there will be more such projects they will be integrated in our life, but common user maybe will not see the difference and will not understand it, just because this thing is backend development, when user contact with interface mostly