Depending on your search volume, this may or may not be a good strategy.
If you have worked in a retail store, or spent many hours shopping at one, you are aware of the ebb and flow of shopping crowds as they relate to what day of week, time of day, or whatever the current sales possibilities are inherent within. Midweek daytime hours are typically shorter staffed than busy nighttime and weekend hours.
Brick and mortar retailers understand the delicate balance of employee scheduling and staffing to correspond with sales opportunities. Too much staff during slow times leads to unprofitability and idleness. Too few during peak times can result in customer dissatisfaction and loss of sales. This same balance should exist in your Paid Search Engine Marketing campaigns.