In the United States of America the most effective way to mine BTC?
Apparently, yes, if a study by the Cambridge Center for Alternative Finance is to be believed. The U.S. retains the highest capacity contribution to bitcoin mining.
The U.S. is followed by China at 21.11%. This is especially noteworthy given the fact that virtual coin mining is officially banned in the "Celestial Empire". Many people who were engaged in crypto pharmacy were forced to move to regions more favorable to this process. One of these regions was the United States of America.
Kazakhstan closes the top three. Its figures are 13.22%. Incidentally, this Central Asian country has also moved some of the Chinese miners. That, in turn, provides such a high rate of hashing.