I had a similar story, mining bitcoin with fpgas, litecoins with gpus and energy for free in a student dorm. I could however pack it in a free room in the dorm. Nobody cared about it. I did around 20 bitcoins, but sold almost everything before it hit 500 euro/coin, because my girlfriend got pregnant and we needed an apartment. I held 3 coins, that after the network split with Bitcoin cash, was doubled. I ended up selling them well.. I still have 5000 peercoins, since the idea was great, and I was able to mine and mint them well, but unfortunately it never became the thing.. Maybe one day, I get rich. For now, I just was able to buy a small apartment with my 3 BTCs..