So yes, if a crypto lasts for a decade it would go up in price because of the network effect it can achieve and by currency inflation. That's the same for EVERYTHING. I could hold stock in company that has never made a profit but lives on debt and government bail outs and that stock would go up in price over 10 years

Has a big mac not gone up in fiat currency terms over 10 years?

If that's the basis of success, then how does a shitcoin offer anything different from other investments?

Let's take your argument of 10 years, part from bitcoin you have

2011 - Litecoin - 5388.3% up on launch price, but -90.9% down against bitcoin
2012 - Peercoin 100% up in launch price, but -99.3% when compared to holding bitcoin
2013 - Dogecoin - 92322.9% up on launch price - but -79.2% against bitcoin
2013 - NXT (Proof of stake) 95.4% up on launch price - but -99.9% against bitcoin

And I am being very generous here because no one gets in on launch price, and your argument still falls flat.

Facts!