I can't give you advice for you to follow, but I only hold TRX, DOGE and ETH in the long run, because other crypto projects that have just arrived in 2019 seem like many are not viable for the long term, so I play it safe for my investment, I also trade often playing the three altcoins above, occasionally looking for profits to multiply my profits little by little
More possibility to failed your doge coin if your purposes to hold for the long term, this my prediction now your choice what can you keep hold or not.
Another 2 different coins going in the right track you will must profit in the long run, because those are future potential coins.
I prefer you can sell DOGE to buy BTC, i hope you will get much profit in this long term investment.