Mega Earthquake 10.0

Is there a possibility of mega earthquake 10,0+ or it is just a fiction an event that will never happen?
The largest earthquake which occurred near the cities of Valdivia and Puerto Montt, Chile, in 1960. Known as the Great Chilean Earthquake, the quake measured an impressive 9.5 on the Richter scale.
Will we have something like this or something bigger in the near future?
Earth seismic events are getting stronger and they are happening recently quite often.
What is to be expected ?
Are we prepared ?

Best Regards