When did Bitcoin reach its highest price on 2013/4/29?
time that a coin reaches its highest price refers to time_high; on 2013/4/29 refers to date = '2013-04-29'
SELECT T2.time_high FROM coins AS T1 INNER JOIN historical AS T2 ON T1.id = T2.coin_id WHERE T2.date = '2013-04-29' AND T1.name = 'Bitcoin'
database name:db_id coinmarketcap
Coins table Coins Cols: id dtype integer, name dtype text, slug dtype text, symbol dtype text, status dtype text, category dtype text, description dtype text, subreddit dtype text, notice dtype text, tags dtype text, tag_names dtype text, website dtype text, platform id dtype integer, date added dtype text, date lanched dtype text, 
Historical table Historical Cols: date dtype date, coin_id dtype integer, coinmarketcap rank dtype integer, Market capitalization dtype real, price dtype real, open dtype real, high dtype real, low dtype real, close dtype real, time_high dtype text, time_low dtype text, volume_24h dtype real, percent change 1h dtype real, percent change 24h dtype real, percent change 7d dtype real, circulating supply dtype real, total supply dtype real, max supply dtype real, number market pairs dtype integer, 
