it's to have a long pow, about 3 months first(this to ensure a good price that is backed by a strong demand, see after...), and then a pos with a very high reward, not the useless 50% or 100% per year, but something like 10% per day? this need to be calculated correctly
this will encourage investors to buy tons of this coins, and increase the demand exponentially, before the pos happen, thus making it hard for a dump to happen when the pos will be a reality, the 3 months time frame is the key here
you need first to allow the price to be strong enough so it cannot be dumped easy when the pos happen, so maybe you can even do 6 months? but do not go too far with it, or the interest will fade away...
10% a day for 6 months, you wouldn't even be trading it against doge after that, It would be trillions of coins
That's my only worry with implementing PoS, the numbers will be out of control with this coin.