Used to mine ETH as foundation to cover the electric bill and then switch to speculative coins. Seems like I have to mine speculative either way what makes me uncomfortable.
What coins can keep a certain level of profitability in medium term w/o large swings?
By most accounts, BTC is the very definition of a speculative investment, so if you are uncomfortable with speculation you probably shouldn't be in crypto at all.
That said, there is a service that is geared specifically towards those that want to mine but can't be bothered to research every (or, really, any) of the coins out there: NiceHash.