That is a fair question. At this point for staking in browser there is no way to use it encrypted so the security is only in the hands of the computer user (have a good AV solution like BItDefender).
Best practice to avoid this is run a very small VM in which you install Linux terminal miner and use encrypted wallet for staking. But this takes a higher degree of knowledge.
This is not exactly a mass adoption scenario.
My sensation is that this is a project by nerds for nerds, all of them dreaming for a mass adoption without being willing to do their homework on what is necessary in the real world for a mass adoption of a currency.
You have built a Ferrari. Cooool! Supercool! Ooops, it doesn't have the wheels, sorry, well, who cares. The cool part of a car aren't the wheels anyway.
This is a crypto coin without any security, where you can't protect the wallet. A car without wheels.
Well, but it's a cool Ferrari.