There is a 3rd possibility: invest the $5k in a mining rig. The problem with investing in cloud miners like Genesis Mining is that the contract often limits their term. For example, if mining Ethereum, the contract is limited to 2 years. Your equipment can be used for much longer and it has the benefit of being used to mine coins which Genesis may not provide an option for. If you don't feel like mining, but prefer to have the coins mined for you, find a friend that is tech savy and consider partnering. His expertise; your power; both split the investment in the machines and the resulting coins.

One other aspect that can't be ignored. Over time, the difficulty in mining (either via a cloud miner or your own equipment) will surely increase. Make sure you factor that in to your return on investment calculation. Ideally, the increasing difficulty will be reflected in a concomitant increase in the price of the coin.

Good luck with whichever option you choose!