This week has provided good signs already with a massive growth in value of bitcoin and other crypto currencies
Everyone is claiming bull run is here, Satoshi is back and so on but I think thats greed setting in
I believe this is the time to cash out if you are in profit already
i dont think any time in 2019 will be good for cash out. because cryptocurrencies became popular once again now and hype of the market is increasing day by day. i wouldn't cash out nowadays.