I'd say about 0.00001% of people have the ability to Sn 2x bw...thats an official number from the office of made up statistics.
Just aim to increase your OLifts by 10-15kg each year.
154kg would be possible for you if you trained full time for at least 3-5yrs.
There are very few people that can Sn 154kg, let alone do it at 77kg. Make short term goals to keep yourself in check
Sn 1.5x bw
CJ 2x bw
Sn 2x bw
btw to get from 100 to 124 is HUGE for a 62kg lifter, let alone any lifter. The dude at 1.9x is a beast!
I will one day Sn 155 but I'll probably be at least 105 or maybe 94...if you think don't think you can do it you WILL NEVER DO IT.
Believe you can do it and set the goals I put above to get yourself on your way mate