There are many Keywords even today for which Adsense pays a massive amount of money like $40, $20. Some of the highest paying Adsense Keywords are Mesothelioma, Bank Loans, Lawsuits, Forex Trading.
But i will suggest you to not make a Site on Such Niches by just because they pays high. Instead you should make a site on a Niche about which you know a lot and you are interested in as well.
But i will suggest you to not make a Site on Such Niches by just because they pays high. Instead you should make a site on a Niche about which you know a lot and you are interested in as well.