Early on, I invested IOTA coin, and convinced some friends to do the same. There was an online seed generator. I generated the seed, and put the coins in a IOTA wallet. 6 to 9 months later, and the coin was doing real well, the wallet was emptied. I checked with my friends and their wallets were also emptied at the same time. The lead at IOTA was no help at all. Publicly said that if you did not know what you were doing, you should have not invested in it. The guy that put up that seed generator was finally arrested some years later, but none of the stolen funds were recovered. That was the end of my alt coin adventures.