Ethereum is not presenting its best sides these days...
- 28/07/2017: Serpent Compiler Vulnerability, REP & Solidity Migration
- 27/07/2017: Security Vulnerability discovered — DigixDAO
- 24/07/2017: Veritaseum Hack: Another Ethereum ICO Hacked; Loses $8.4 Million
- 19/07/2017: Parity, an Ethereum Wallet Exploited. $31m allegedly stolen already
I'm not feeling that confident in keeping value there to be honest.
And this is nothing you can prevent on your local security level such as using Trezor... Hacks are based on fundamental core levels.