Blockchain scalability, namely: Since blockchain technology was discovered and gave birth to bitcoin as the world's first cryptocurrency, this technology has a capacity of 1 MB per block sizenya with the ability to confirm 7 transactions per second. With the development of bitcoin that is increasingly being used by people, the more the number of transactions per second, the more slow the transaction (transfer time).
If in this second instance there are 100 transactions, then the blockchain only processes 7 transactions in the first second, then 97 other transactions wait in the next second alias queue. Similar to the quota of pilgrims. So what happens is the expansion of the network or also known as HARDFORK / SEGWIT which gives birth to new types of coins such as:
- Bitcoin Cash (BCH)
- Bitcoin Gold (BTG)
- Bitcoin Diamond (BCD)
- Bitcoin2x (B2X)
With a completely new system and amount of supply. But this does not add to the ability to confirm the coin master transaction, namely bitcoin.
To handle several government projects such as elections, railways etc. it's true that blockchain technology is very useful, but not for payment technology.