Oh-kay, so it seems from that statement you're new to crypto lol. No it's not speculation because difficulty increasing over time is the norm, it's not speculation just like it's not speculation to say the sun will rise to it's apex then fall to a sunset. Difficulty remaining static and the sun being abducted by aliens are the speculative outliers.
It is, BUT the fact remains that instead of buying the Vega you could just buy all the crypto it would make you over the next year and horde it or trade it to increase your money.
I know, I plan on selling them my Vegas when I get back from vacation.
Careful that straw's flammable.