The only secure coins for me with how the market is going right now is a stablecoins. Thanks to Stop-loss, I converted my holdings to stablecoin automatically, but now maybe it's a good entry point again, and I'd advise you to make your huge Bitcoin holding and perhaps some Ethereum and top 5 coins. We have proven to be durable overtime and do not turn to massive losses overnight as we saw with so many coins listed on the 2018 exchanges.
I was holding BTC, ETH, XLM and few altcoins but converted to USDT today. After the Chinese new year which spans from 25th January to 8th February, I'll buy back my holdings. Aside BTC, ETH is the best coin to buy with huge potentials in my own opinion.