Background:

When I first used site, XRB, it used to provide 200 XRB for 4000 captchas solved which used to be 5$ and approximately I used to complete it in 3 hr. By the time goes, the limit of captchas varied from 4000 to 8000 but price of XRB goes on increasing from $5 to $20.

The complexity of captchas also became tougher but it was intresting to play with coin . The approxiamte value of XRB at that time was:
1 XRB= 1900 satoshis=$0.30 at that time.

After some time the value spikes to:
1 XRB =240,000 satoshi= $ 39

Now,

But now value of XRB has decreased to :
1 XRB=49000 satoshii= $3

So . hurry up guys trade with the coin. It has lots of future in it.

Now it's name has been changed to

NANO

and it has its own wallet and you can exchange and trade in site like binance, mercatox, bitgrail etc..