The blockchain is complex. That is why processing any transactions requires more time. Additionally, the system's encryption slows it down even more. 
Following are the reasons that show why implementing blockchain is difficult:
- Rising Cost of Blockchain Implementation
- Low Scalability
- Low Data Privacy
- Insufficient Knowledge-base on Blockchain
- Lack of Regulations

The main use of the Blockchain is that it can make it easier to track assets and record transactions in a business network. An asset may be physical (such as a home, car, money, or land) or intangible (intellectual property, patents, copyrights, branding). On a blockchain network, practically anything of value could be tracked and traded, lowering risk and increasing efficiency for all parties. It has effectively improved financial services implementation, data management and protection, healthcare technology advancements, government policy transparency, better asset management, and many other services.

Integrating with blockchain typically involves programming with a blockchain's API. This will allow you to send and receive data to and from the blockchain.
Additionally, this programming can include writing smart contracts, setting up wallets, and deploying applications. It is important to understand the specific blockchain technology in order to effectively integrate with it, and to make sure that the integration is secure and compliant with the network's regulations. Additionally, there are many different tools available that can help with integration, such as libraries and frameworks, which can help simplify the process.

So far, the biggest use case of blockchain technology is cryptocurrencies , Bitcoin is the first use case, but not the only case. Blockchain is a distributed, online public ledger allowing the tracking of digitally transferred assets. Blockchain technology allows cryptocurrency (i. e., bitcoin) to be transferred directly between individuals or entities without going through a traditional financial institution.