From CNBC, money managers looking for growth are seriously looking to position portfolios with crypto exposure.
With market cap now exceeding $100B, the space is considered large enough for money managers to acquire a diversified basket of crypto assets to offer to investors as a vehicle for growth in retirement and investment portfolios.
Crypto Asset Fund LLC (https://www.sec.gov/Archives/edgar/data/1708456/000170845617000001/xslFormDX01/primary_doc.xml) expects to raise up to $400M to put towards a pool of diversified crypto assests.
Here is the related CNBC article:
http://www.cnbc.com/2017/06/06/crypto-asset-fund-aims-to-raise-400-million-for-blockchain-deals.html
Conclusion: This space is nowhere close to a bubble!