Its not too far. 40 year a lot of us will live to see that.
BD Population will max out 22-25 crore and then start declining after 2030.
My personal opinion is that BD will be in the top 20 economies of the world by 2050 but there are too many unknown variables to consider like war, food/energy supplies and general geopolitics.
One of the big hurdles that BD needs to tackle if it is to become anything other than a middle income country is a virtual
lack of a technological base currently. Things like garments and low-end manufacturing just won't cut it to propel the economy to a high-end GDP/capita level.
Without developing it's own advanced technology, BD's growth will probably stagnate after around 2030 as by then it would have plateau'd in terms of agricultural and low/mid end manufacturing growth.
I am optimistic but things may not turn out the way that we would like.