The purchase of any asset by the user can be called an investment, unless of course you are sure that this asset will increase in value.
I think investment is when people do not sell the bought assets and hold the assets for a long time.
That people would make a long term investments it is necessary that they trust the project. It is necessary to interest people to buy tokens for a long period of time. Leasing program of EDC interest people to lease their tokens for 3, 6 or 12 month.