It is know that bitcoin has made a few millionaires, but many of these people don´t have any particular knowledge of the economy nor business. Do you think that is a fair situation?
In my mind, if they didn't rob or scam someone, then it's fair. You may or may not like the fact that some people got rich easily, but they didn't do any harm to others, so it can't be a crime.
The idea that speculative profits are unfair comes from communist ideology, because in that theory value is created only through labor, therefore any non-labor income have to be some sort of a fraud, otherwise communists just can't explain it within their theory. But Austrian and mainstream economics view trading as a positive function that establishes market prices and creates signals that guide economic growth.
There must be all kind of people who have become millionaires with bitcoin. Those who were using it for illegal trades on Silk Route, those who bought/ mined on a whim and then forgot all about it, those who held on through the years or those who held on and traded since last year after it became mainstream.
I think they all deserve it except the first category. The scammers are plenty. To give an example of my own country India, there was a drive by the Indian government to curb black money by suddenly banning all big denomination notes in November 16. A lot of corrupt businessmen and bureaucrats keep their ill-gotten money as cash.
This even includes people like lawyers, doctors etc. who earn huge amounts from private practices but keep it in cash so that they don't have to pay takes on this.
Immediately after this demonetisation steps, a few shrewd guys who had known about bitcoin back then started offering to turn this cash into secret currency for these people. A huge amount of funds changed hands and the people were given bitcoins in the form of paper wallets etc. People invested millions of their ill-gotten money when BTC was under 1000 USD.
Guess what, those people not only were able to save their black money but multiplied it many times making themselves multi-millionaires.
The Doctors/ lawyers probably deserve it but not the corrupt govt. officials who keep their bribe money in cash.