I've been repeatedly spending part of my fiat profit to buy more and more btc.
I even don't have plans to sell at all. I believe soon there will have no need in exchanging btc to fiat as everybody will be able pay for anything with bitcoin.
The most of btc I spent this year were wage payments to some of my contractors abroad.
I think your 'soon' is incorrect. Unless you mean decades with soon?
Also, if I remember correctly, you had almost all your capital on a saving account while banks collapsing had been news for years.
And then you blame your loss on others.
What makes you so confident that your investment skills have dramatically improved?
Now you already can pay in btc (indirectly) for goods on amazon and many retail stores in the US. You also can buy air tickets and book hotels and cruises with btc. Soon you will be able to buy cars and homes directly from dealers. What's more?
About my lost capital. It was not investment, but operating money of my business and it's not my fault that EU decided to rob my bank.
In contrary, the most of my investments are now safe and gained in price (except gold). The most gains I got in 2012-2013 were from bitcoin and it really saved my business from collapse.