My craziest dream come true was over 10 years ago.
Got into a niche area of antiques with the dream I'd find something really valuable and make a lot of money.
Bought it on eBay for £200, sold it at auction at Bonhams in London, price reported in papers was £46,800 (was a hammer price of £39,000 but the buyer had to pay a 20% premium to the auctioneer - as did I).
After commission and taxes made about £27,000.
It was allegedly bought by one Mr Trump of New York - don't know if that's true or not, but it's what I was told by an auctioneer at the time.