I have invested in ETN at the beginning and all I can tell you is that the whole project is a mess.
At first, they have copied Monero source code that included some sort of bug that Monero developers fixed few versions ahead.
ETN developers were completely oblivious to this (google Monero burning bug), which is a first red flag as you would expect from
one that copies software, to at least include patches done by upstream team.
On top of that, they haven't produced anything tangible (ICOs rarely do), and their leader (Richard Ells) is a great marketeer, but absolutely
clueless on technical side.
In the end all of this is already distilled in the price, and price never lies (check reported ROI and volume):
https://coinmarketcap.com/currencies/electroneum/
I got out at a loss, and never looked back.