Nothing to worry about!

Of course, this is a database of all possible outcomes of private key strings. A few lines of computer code can generate that in minutes. It's so simple. Nothing new.

Similarly, one can also generate all possible outcomes of public keys quite easily.

For a computer programmer/developer, this stuff is the easiest.

The real achievement is that  


Example:

If debit card pin codes are 6 digits long then one can easily generate and publish all the pin codes of all the debit cards in the world in minutes i.e. by generating the all digits from 000000-999999 and doing that is so much easy. But real part is finding out which pin belongs to which debit card.

Similarly finding a match between a Bitcoin private-key and its public-key is next to impossible!