I think the underlying protocols of the big name crypto like BTC, ETH, etc... are relatively robust - I don't think anyone is doubting those. I think the thing

I think the underlying protocols of the big name crypto like BTC, ETH, etc... are relatively robust - I don't think anyone is doubting those. I think the thing in doubt is the complex applications running in the application space of currencies that support such functionality. These applications can often be nearly as as the underlying protocol with much looser requirements around testing!