Now........ is the only logical answer to your question. Speed up to me is acceleration.  Acceleration is gaining speed so the current rate is always increasing and going faster and rate of speed, with unknown variables, is very difficult to calculate.  Things that speed up move faster.  That is the ongoing trend.  The faster it goes the faster it continues to go unless there is a deceleration which appears to be very unlikely.  Speeding up is not a constant number but it is undeniably happening.  The process continues to move faster.   At any point that sea level moves at 8X it's present rate disaster will have already been visited up us.