I do like that point of view!
Doing the same here. Either the coin goes a long way (in terms of years) or I lose all I 'invested'. No regrests.. although for me it is 'easier' since I only mined it and never bought a big amount. Since I mined them and don't have an exact amount of money that I 'invested' to buy them I do not see the coins that strongly as money I am losing.

It is in my opinion not wise to invest (except for day to day trading) if you invest an amount of money where you are not prepared to go for the long run (or are prepared to lose everything), think about it... tomorrow there might be something seriously wrong about the blockchain in which you invested.

I mined about 20-30 coins 3 years ago. From those 20-30, 2 went up significantly, the rest died or the amount I have is almost worthless. But those 2 coins were worth it.