Because like every utility token RLC is deflationary by essence.

It will always go down even with strong demand, because workers will keep selling into the bid to cover cost of electricity and hardware...
And people running dapps won't be stupid enough to buy into the ask, they'll just put order below bid and wait for workers to dump on they orders.

The only way for it to go up is through rigged manipulation, like every market on earth (look at oil, gold etc)...
or you would need an automated burning mecanism to keep the value up.