I have to admit to making some money out of Bitcoin primarily because I was curious and mined a decent number closer to the beginning of the splurge - on of all things a MacPro with a graphics accelerator. It all went to the kids - and I explained it was our fluke, but hey, if people are throwing money at you perfectly lawfully (and HMRC knows all) then I didn't look a gift horse in the mouth. I do hope they recognise a fluke and do not invest in one.
PS: they cashed in at some silly premium based on the cost of generation (power - the machine was unused when I was not home). Well below peak but well above the current 'value'. 25% of it went to UK charities. If people wish to throw their money at something silly then they need a lesson. Unfortunately many seem not to learn the lesson.