I lost all my Raiblocks / NANO, but I'm starting to rebuy at these levels, while folks are fearful.

I originally invested in early December and saw insane gains, but was unable with withdraw funds from Bitgrail before the hack (I had been trying for months).  

Luckily, it was only 10% of my portfolio, as I keep no more than 20% of my portfolio in any one place.

It's a good idea to spread your portfolio in many places, so there is no single point of failure. Diversification in both assets and in storage mediums. That means hardware wallet + software wallets + several exchanges (with 2FA protection). Those who think their funds are secure by putting 100% of them on a hardware wallet are delusional, as they are still prone to loose everything due to human error (e.g., loosing recovery phrase).

I expect the most common ways of loosing funds in crypto are user error and exchange hacks. Diversification is currently the best protection against these things, and I wish more people took it seriously.

The fundamentals of NANO have not changed, and it has corrected 65% from the peak in BTC value. Looks like a reasonable place to scale back in IMO. And if it continues to fall, I'll add more at key resistance levels.

NANO is still undervalued compared to its transaction-focused competitors (LTC, DASH, BCH), and has dramatically better technology and value proposition.