I'll have to break into 2 snaps here to go:
select sum(case when [amount_symbol] = 'HIVE' THEN [amount] ELSE 0 END) AS HiveTotal,
sum(case when [amount_symbol] = 'HBD' THEN [amount] ELSE 0 END) AS HBDTotal
FROM [TxTransfers]
WHERE [from] = 'commentrewarder'