Here is another article on the potential of blockchain  to reduce fraud, this time in the financial and banking sector.  

Whilst blockchain is extremely exciting it does pay to issue a cautionary note. Blockchain is not fast and this will need to improve especially for financial transactions.

 Take VISA - it processes some 25,000 transactions a second. Bitcoin can manage 75. This is because every single transaction requires the entire de-centralised ledger to be verified. Put another way, imagine having to proof read an entire book every time you type a new word.

 You can see the problem I am sure.