With out a doubt the author of this post is correct however spending money frivolously for the sake of helping the economy is also kind of stupid so...
You do not need to spend a lot of bitcoin. You can just circulate 10% of your bitcoin, that will be a big help.
There are a lot of bitcoins into circulationg those people who are saving them arent making any damage at bitcoin, as less coins more pression, soo in the end those people are helping bitcoin has been made to handle transactions but if people do wanna save them till they resell it wont hurt bitcoin.