The top 13 banks heavily invested on crypto currencies! They are vulnerable to waves of volatility! Risk is alerted for investors. 

1. Standard Chartered (UK) - $380 million and 6 investments at the bank include blockchain network Ripple, whose XRP token has a capitalization of around $48 billion, according to Coinmarketcap.com, making it the sixth-largest cryptocurrency by market value. It's also an investor in Cobalt, a trading technology provider based in the UK.

2. BNY Mellon (US) - $321 million and 5 investments. One of them is Fireblocks that allows financial institutions to issue, move and store cryptocurrencies. Banks have been investing the most in the area of crypto custody, or services under which companies look after their clients' digital assets for a fee.

3. Citibank (US) - $279 million and 14 investments. The fourth-largest bank in the US has invested in SETL, whose ledger technology is used to move cash and other assets. 

4. UBS (SWISS) - $266 million and 5 investments The Swiss banking heavyweight's lineup includes Axoni, whose technology is used to modernize infrastructure in capital markets. 

5. BNP Paribas (FR) - $236 million and 9 investments. The French financial group was working with Digital Asset to develop real-time trade and settlement applications using smart contracts based on the DAML programming language. 

6. Morgan Stanley (US) - $234 million with 3 investments. One of its investments is NYDIG, a crypto custody firm and the bitcoin subsidiary of Stone Ridge.

7. JP Morgan Chase (US) - $206 million and 8 investments on ConsenSys, an Ethereum software company, has received backing from the largest bank in the US. 

8. Goldman Sachs (US) - $204 million and 8 investments on Coin Metrics, a provider of blockchain data to institutional clients. 

9. MUFG (US) - $185 million and 6 investments on Japan's Mitsubishi UFJ Financial Group has invested in Coinbase, the US cryptocurrency exchange that went public in April, and in Bitflyer, a Tokyo-based cryptocurrency exchange. 

10. ING (US)  - $170 million and 6 investments on the Dutch multinational has backed HQLAx, a blockchain liquidity management platform. It has filed a chapter 11 bankruptcy during 2008 economic crisis. 

11. BBVA (Turkish) - $167 million and 5 investments on the Spanish lender's list includes Covault, whose technology is used to store, share and verify identities. 

12. Nomura (Japan) - $146 million and 5 investments on the Quantstamp, a blockchain security firm, is one of the companies the Japanese bank is backing.  

13. Barclays (UK) - $12 million and 22 investments