I am sure everyone would like to hear your theories on what makes you say "some people think you need 51% of the supply but this is bs, you need only a very little % if you just want to do a single double spend." The two PHDs who wrote that research say it "nearly impossible" to do what you say is trivial...
no need for everyone to hear my theories... just watch my practice...
I'll tell you my theories anyway: the two PhDs who wrote that research have a clear nxt bias. Look at their hidden multibranch section: they say that they got 3/20 of 500 blocks with 10% stake. 3/20 of 500 is 75 blocks. They got 75 blocks! if people wait for 6 confirmations, I only need 6 blocks, not 75. So I can do with much less than 10% stake. Of course 10% stake means 10% of actively forging coins, which means 10% of 10% of supply. So, much less than 1% of supply to double spend. Of course that's still a few hundred BTCs for NXT so I'll start with a smaller coin.
I already bought a few coins... just wait until age is accumulated...