List all the fields that we will use in the study in addition to those available in santiment and source of that field. Suggested Format Asset/Source/Fields BTC/Blockchain.info/Close AvgBlockSize, Ntransactions, Difficulty, BlocksSize, CostPerTransaction, HashRate, MarketCap, MedianConfirmationTime, NTransactionsperBlock, transactionfees, nuniqueaddresses, estimatedtransactionvolumeusd, MinersRevenue

ETH/Etherscan.io/Address, Blocks, Blocksize, Blocktime, Difficulty, Close, EtherSuppy, EtherSupplyGrowth, GasLimit, GasPrice, GasUsed, HashRate, Mcap, Tx, Uncles,