@alexkof just define a number, required to run node. that’s it. do it after 2fa.
limitation with percentage of funds can cause more centralization. like you said.
I support that, the number of coins should be 1000 in node wallet. imo it is fair enough when you think the future of waves chain.
read this topic to see all solutions 
Incentivisation With Inflatıon + Coin Burn [discussion]