he was very brave and at the same time very irresponsible, but he had the opportunity to buy when the price was too low, according to the article he bought between February and September 2017, so even now he still has profits, but the problem here is if by chance the price drop too much and he lost everything? his children need a good education and this can be done with money, his children need a good feeding and have quality health and for that it is necessary to have money and it seems to me that he is not aware of it.
Very little that separates bravery from foolhardiness. I can respect the guy's decision, especially since it seems to be a joint one with his partner, although I couldn't say if any of his children's opinions should have counted! He seems to have escaped punishment from his government for not putting his children through school but I daresay they're gaining quite a unique piece of education in their current life.
He does seem aware of the need to eat though, this experiment will end when they achieve enough to sustain their lifetime - or when it crashes as you say, at which point they try something else. It's really not much different from a lot of people who work 9 to 5s just to feed their families, and equally no Plan B if they lose their job.
It would have to go to half of today's price for him to lose anything. IMO it's not possible. Do you really believe that it's suddenly going to fall to 3000 USD when it was in a strong bear market for months and couldn't even fall below 6000 USD? This guy made a very difficult and risky decision. He bet it all and won. Even now, when BTC is oversold and scrubbing the bottom, the value of his investment is double what it was a year ago. I envy him in a way, wish my parents knew what to do with their money.
He's a winner... right now, but until he realises any of these profits, the jury's still out. I do envy him... but I feel I couldn't afford the same gamble. He has 3 young children who could probably still be all right (social benefits in Netherlands) but my dependents have zero social net to take care of them if I lose.