Netcoins, the crypto brokerage owned by BIGG Digital Assets (OTCQX:BBKCF), has added four additional cryptocurrencies to its trading platform.Those digital tokens include Cardano (ADA-USD) -1.8%, Solana (SOL-USD) -4.9%, Polkadot (DOT-USD) -5.4% and Gala (GALA-USD) -0.5%, all of which are dipping in Wednesday afternoon trading amid a broader risk-off environment. Canadian-based Netcoins now has 36 listed coins.The move comes after Netcoins received approval for an update to its restricted dealer license allowing a broader coin offering on the platform.Towards the end of May, BIGG Digital Assets' Netcoins added The Sandbox, Uniswap and other coins to its trading platform.