Investing 100K in mining operation, which crypto to mine &hardware?

Hi all,

I have plans investing max. 100K in mining hardware. Because of the relatively high Kwh price in our country (Netherlands), I'm looking for a way to mine with green power to cut the costs.
To the point, I would like to ask you for some advice about which crypto would be the most profitable and stable. Maybe it's even a good idea to mine multiple ones..
My thoughts go to Bitcoin, Ethereum, Monero and Waves. What do you guys think? I would also like to know what kind of hardware I should use, because the pascal and volta cards are coming, maybe i'm better off waiting for them instead of buying (for example) a bunch of 1080's.

I'm fairly new in the crypto world, I do research a lot but I would like to know what other people have to say.

Thanks.