Am not sure if it will be possible for such keyboards to hack bank accounts or anything related. What I think is that there's no need of using such keyboards because some of them are always full of errors and use much data despite of them being beautiful. In fact I don't recommend neon keyboard, I once installed this keyboard but didn't work to my expectations. I used it for three days and then on the fourth day , the letters were disarranged. Instead of QWERTY it was QWERTZ. I gave it sometime whether it will go back to normal but nothing happened. Also some of those keyboards don't have the autocorrect function and in case you're not sure of a word, you'll have to consult the dictionary first thus wasting your time.