As a billing item, you can purchase Chrono Crystals × 320 and fragment number expansion × 5 for a total of 960 yen. Since this set can be purchased up to 10 times, you can purchase Chrono Crystals × 9600 and fragment possession number extension × 3200 for 50 yen at the maximum purchase.
The number of types of fragments will also increase, and it is necessary to collect and collect fragments to some extent before strengthening those with good numerical values, but before that, the maximum number of possessions comes and it is full. I want to sell the fragments I don't need, but I couldn't sort it out because I thought it might be a material for the awakening fragment.
You can also increase the number of fragments you have by using rare medals and Z medals. See the following article for details.