Looks like can buy as many packs of bonds as you want after completing the chapters

I brought 2 packs of 300 and looks that there is no limit as long as you have points

Very, very nice indeed

https://preview.redd.it/o06kq3gy9ix81.jpg?width=2434&format=pjpg&auto=webp&s=0e641f7107170c1f2d60956d4a11306f38bac8c6