Like any good portfolio, you shouldn't have all your eggs in one basket, currently my farm is split as follows: 108Th SHA265, 9.15Gh X11, 36 x 1070GTX's
w/cryptocoin holdings, 35% BTC, 40% ETH, 25% other ALTs
I recommend everyone diversity, this is no different than investing in stocks, precious metals, real estate, etc. Be smart, diversity and HODL!
Mining4Bacon
Agreed, If this would be a an expertise area, I'd say focus on one thing and be the best one. But in terms of investing, don't rely on single unit.