Anyhow, if you want it or not, adding it would increase the value of waves significantly. There is a reason most of the successful exchanges and all banks (where i live) and actually most of the places where you can store money uses it. A place that handles and stores money should have 2FA, it is an industry standard.
Well, I don't like 2FA and I never use it in any exchanges. It must be optional, if it's a must then I don't use that site/app.
WAVES don't need 2FA to raise their price. The project sell itself already.
Yes, of course it should be optional, one thing shouldnt exclude the other

. I am actually happy that there are still people out there not using 2FA, makes me less of a target. Most people wont be comfortable storing any significant amount of money in a place that dont have 2FA, im actually more comfortable storing money on an exchange like poloniex or bittrex than i am storing in waves DEX bc of 2FA, this defeats some of the purpose of their DEX service.