What I could handle 5 years ago is only a fraction of what I can handle now.
What I could handle 5 years ago is much more than what I could do 10 years ago.
At some point in the future, I imagine that I won’t be able to handle as much as I can now.
The point is, things change over time.
You never know what you’ll be capable of in the future unless you try, in spite of your perceived ability.