I have plans investing max. 100K in mining hardware.
Bullshit, no you don't. Stop wasting everyone's time with this idiotic question.
How would you know? Are you jealous or what? It's not my own money but I ask this because I have a couple of investors I know who want to start this. So pls don't be a smartass and just shut if you don't have anything normal to say.
Dude just look back to the last 2 months of ports in the subforum. Bi-weekly someone posts the same exact question: "I plan on building a rig, my budget is "INSERT HIGH NUMBER HERE." What should I buy?" You said yourself that you are new to the crypto world, why on earth would any investor give you so much money to build a mining operation? But to answer your question, if you want to know what you can can mine that is the most profitable and stable, bulk order a lot of Antminer S9's; Bitcoin is king. And are these clients hiring you to manage this stuff full time? Managing a $100k alt-mining operation sounds like an absolute nightmare.