Credits

Whenever I read a comment here people always talk about how easy making billions, I'm currently doing exobiology since last week for at least 1-2 hrs a day. I made 855 millions so far and my highest run was 250m, I'm using the billioners' boulevard for the planets. Is this a normal speed or am I doing something wrong? I tried mining again since it was my way before leaving for a while, I did 25m in 1-1.5 hour. I'm wondering if these rates are normal or is there a better way. With this speed I don't think I can afford a FC which is my current goal to sail away freely.