Question about using historical results to calculate revenue

I’ve just started this financial year with a big (for me) first quarter and it’s got me a little lost with forecasting future revenue.

I’ve gone from 45k revenue in each quarter for the last 6 quarters to 120k so far this quarter. While I’m pumped about the results and fairly quick growth, I’m not sure how long I need to see these numbers before making any changes to the business (hiring staff, buying more inventory etc.).

Does anybody use previous revenue history to predict future revenue? Obviously the longer the better, but is one quarter of revenue enough time to base calculations off?