Cryptocurrency at large has it own functionality and if economy seems not to grow that doesn't mean it would affect bitcoin in fact to me I sees it to be the alt means of reviving our money or assets. With the inflation rate I may decide to convert all my fiat use them to buy bitcoin and hold and after some while I could sell back to gain back my money so is another means to save us from financial meltdown or crisis.
A good thing when we move assets from Fiat to Bitcoin or Altcoins, the opportunity to continue to grow is very large so that I am sure that the future of cryptocurrencies will continue to improve so that we can get a large income or profit.