If a coins value can be determined by its network hashrate then maybe you should sell ltc and buy something else

LTC: 77.93 GH/s, DOGE: 103.84 GH/s
Im not saying doge is a better long term investment, but it will go through a couple of block halvings this year and if its popularity stays on the same level the value should increase by quite a lot.
Not sure where you get those numbers lol, but the continuous doge hashrate is definitely not that high. Doge has around 1/3 the network strength of LTC. Doge is a hillarious and profitable (for now) joke. But the chances of it appreciating in value seem pretty slim. The variable reward blocks are attracting a lot of profit-switching pools like middlecoin to rape the high reward blocks, but then almost nobody mines the low reward blocks. Only accurate metric for doge hashrate is difficulty (this is why coinchoose shows ? ? ? for network hashrate).