To encourage spending, we need to introduce more ways to earn and also inform already earners to spend part of what they earn. They should have no problem spending bitcoins since they will be earning more. And if spenders are prudent or smart enough, they would be spending their bitcoins on things they can sell for more bitcoins, or things that help them produce more things they can sell for bitcoins.
Individuals have different reasons why they buy Bitcoin, and we can't just make them spend their coins, some of them have goals to hold for long term, as a matter of fact they will even buy more and try not to spend any, meanwhile there are some that are willing to spend theirs, it's a good thing we have those sets of individuals, and you can be one of them you don't have to wait for others to buy with Bitcoin from you first before you you will be willing to spend yours, as long as your willing to do business with Bitcoin, you will eventually see those who are willing to sell to you naturally.