Which is the best Asics to undermine bitcoin?

Which is the best asics available today on the market to undermine bitcoins?
In this post I will talk about the asics available on the market to undermine bitcoin updated in March 2019.
Of course, many of you already know what an Asics is and what it is for, if you should not know it, go to this link to get an idea.
https://en.bitcoin.it/wiki/ASIC

Today there are many companies that produce these machines specialized in the extraction of the famous currency.
But let's see which ones are specific.

data from the Asic miner value site that can be reached here:
https://www.asicminervalue.com/

In this table we find several models, but as we can see the best seems to be the 8 Nano Pro with a power of 4000 w can develop 76 th / s, it seems very interesting.
Of course we must take into account the cost of the corente that if it should cost 0.03 $ then this asics would produce about $ 2600.00 in a year considering that the bitcoin would remain at the price of 4000 $.

I send you to this site to evaluate the convention of the mining of the various currencies.
https://whattomine.com/coins

In conclusion, if you want to start entering this investment I suggest you first evaluate your cash availability and then evaluate the cost of electricity that becomes essential for this business.

Thanks again for the next one.