In response to increased demand from investors who want to integrate cryptocurrencies in their portfolios, French lender Societe Generale (OTCPK:SCGLF) has introduced new services for its asset manager clients looking to develop crypto-based funds, according to a recent release.Those services allow asset managers to act as a fund custodian, valuator and liability manager "in a simple and adapted manner, within the European regulatory framework," the bank said.Arquant Capital SAS, a French asset manager, adopted Societe's (OTCPK:SCGLF) service enabling it to open a number of crypto-invested funds, starting with bitcoin (BTC-USD) and ethereum (ETH-USD) derivatives products. The move comes off the back of BNP Paribas' (OTCQX:BNPQF) (OTCQX:BNPQY) move to team up with crypto custody firm Metaco.