If you could become invisible at will, would you do it? Of course you would.
If you could be more powerful than anyone else, would you want that? Possibly yes, possibly no.
The trickiest question...
If you could summon spirits of the dead...therefore controlling time, would you do it? Hopefully not, though there are times when the temptation would definitely be there.
If you had control of all of these, you’d be a formidable foe, indeed...and a definite target!
Don’t be a Voldemort. Or a Grindelwald. Just keep the cloak!