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I was made to understand that blockchain indeed is expensive (here)
I understand the importance of blockchain, but we have been used to a system where the end user is given less burden to use the product.
will this not be a hinderance to take blockchain based products on higher scale?
Question2: will it make any difference if we use a private blockchain?
It is not recommended to use blockchain for everything. It should be used mainly to transfer values : coins, assets of all kinds, etc.
For everything else can be used any decentralized storage system like : ipfs (http://ipfs/io), swarm (https://github.com/ethereum/go-ethereum/wiki/Swarm---distributed-preimage-archive) and so on.
open ended
