Back in 2013, BitCoin was a fairly unknown internet currency, and while it is still generally speaking not widely used, cryptocurrency as a whole has gained a lot more notoriety in recent years, with Bitcoin paving the way for other newer currencies like Etherium and Doge Coin.
Well James Howells, a British man, accidentally threw away a hard drive with 7,500 bitcoin on it, which today would be worth $350 Million dollars. He's been searching his local landfill for the last 8 years for the hard drive and has yet to find it.