Primary key auto increment best practices
You're using a BIGINT which is 8 bytes. The maximum value you can store in a BIGINT is 18446744073709551615 if unsigned. At your rate of insertion of approximately 100 thousand rows per day, it will take you 459445680541 years to overflow.

In short, you have nothing to worry about.

In fact, you should consider changing this field to INT which is 4 bytes, with maximum value of 4294967295, which you can use for approximately 110 years before overflowing.