Generally speaking, it is not possible to increase the limit for credit card savings and consumption, because the credit card limit is mainly determined based on the applicant's income and card usage habits, so this idea is unrealistic and unfeasible. In other words, if you have a good income and own real estate and cars, the credit limit you get will be higher. However, there are still banks that increase the limit through other methods. For example, some banks launch zero-limit credit cards. This kind of card requires the cardholder to deposit money before spending. However, as the amount of consumption increases, the overdraft limit will automatically upgrade, so the limit can also be increased in this case.
So the methods for increasing the credit limit are different for different credit cards, but the question of whether the savings can be increased is generally impossible, and this approach is unrealistic.