# Gavin Andresen
# 2011-01-23 18:45:47
# https://bitcointalk.org/index.php?topic=2923.msg40744#msg40744

From the Quora question: @p{par}


@s{quotedtext}
@s{quotedtext}
 @p{brk}
You can't spend 400 BTC 80 times in 1 hour.  If you control a majority of the generation you could spend them twice an an hour (assuming merchants require 6 confirmations). @p{par}

So you need to divide your expected profit per hour by 40, making your ROI very, very negative. @p{par}