In my opinion, CoinPayU is not a great site if you are only looking to earn Bitcoin or other cryptos. You have to be very patient because most of the earning opportunities it offers have very low rewards.
Bitcoin and other crypto is by many seen as a great asset to get a hold of because of crypto's æong-term potential.
And if you are interested in getting Bitcoin or other cryptos without investing in it, there are actually plenty of sites that claim to offer you a way to do this. One such site is called Coinpayu. This site promises to pay you in Bitcoin and other cryptos just for clicking ads and doing other small online tasks.