The biggest risk with these miners is needed to get rid of them quick.
6 steem sounds like quite the bargain though and if that has been the price recently I've definitely been missing out.
The only thing I struggle with is you can just invest in LEO directly and then just get the passive rewards through delegation or curation which is the largest struggle for me as the SteemLeo token is much more liquid than the miners.
You earn faster if you buy LEO directly but with miners you can also delegate/curate it takes some time till the miners catch up to the amount of LEO you could have bought instead of the miners. I calculated roughly 30 months till the miners catch up.
https://steemit.com/hive-167922/@flipstar/miners-vs-leo-from-the-market