IOTA use to be a top coin, i didn't follow its development but its been one of the most profitable coin. i wanted to buy some of it but i stick to some new ones right now. i also have are few monero that i can't sell because its kept in a file only that i have to recover. upgrading is a pain in the ass as compare to having a mobile wallet really. but this monero i have was here long enough back in 2016. if i still keep it, it will be there til i will forget i have some of it.