That's only possible theoretically, but not practically. For example, if you're a newborn, then expect your rate of growth to increase rapidly and fastest around puberty. However, you will reach a certain point, where your body (system) will not sustain the same growth rate.
Consider the GDP of China...China experienced double-digit GDP growth rate, but has failed to keep that going. There are systemic limitations to how much something can increase.
There are other more technical reasons for this as well. It's late at night where I'm at so I'm not gonna get into it right now.
I see your point man, but now you are the one comparing apples to oranges. For cryptocurrency, it's possible theoretically AND practically, since this market is so young, and the demand for this technology is enormous. In the long term (5+ years or so) I would agree with you and say that this growth rate cannot be maintained. But for the next few years at least, we can expect even bigger growth rates than 2017.
Let's see what happens! That's all I can say for right now...