Hi , I had bought Sonm long time ago but still keep in MyEther Wallet, Is that ok and safe if i just keep there?
it is as safe as MEW is.
yes your mew is safe if you don't use HOLA chrome extension or browser
HOLA was hacked and MEW developers announce that in their MEW twitter official channel. check out their official channel
if you using HOLA and put you Private key in MEW to access your wallet then your wallet might be at risk
sonm is now in a very good state and its price is also very buy-able now