It is one of the major problems that are associated with the digital cash. In fact, it’s a condition when one digital token is spent multiple times because the token generally consists of a digital file that can easily be cloned. It simply leads to inflation and organizations has to bear a huge loss. One of the primary aims of Blockchain technology is to eliminate this approach up to the possible extent.
It can be easily cloned but the address of that clone will not be same. Parties just have to aware of real address of the digital cash they are transacting with.
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coin cloning will definitely result in inflation. but for crypto coins that have a high selling power will definitely survive, even though the value of the coin has decreased, for example Ethereum.