The experience up to now is that despite crashes and hypes, this crypto thing is not going away and only becomes stronger with each wave. With diverse Blockchain alternatives popping up in this hype/burn cycle, the vulnerability of cryptocurrency as a whole is is lower than ever.

Even if Bitcoin runs into an accident and cannot grow further beyond its technical limitations, many alternatives without these limitations are already available.

One thing is sure, no 'corporate version' of cryptocurrency will be able to crow out free open source versions. Together, we are strong.