Profit Boosts from Upgrades

There are different profit boosts that can be purchased for AdVenture Capitalist, either through money or angels. Do these have an impact on all your profit earnings going forward, or are they just for that period of time?
What I mean is will any bonus, e.g. a profit x 3, be for all profits of businesses purchased in the future, or is it just for all businesses as they are at that moment? What I'm trying to work out is if it's best to buy all profit bonuses as soon as possible, or wait until I have a large amount of businesses before buying them.
Best Answer
The upgrade and unlock bonuses will apply the bonus for all applicable businesses, existing and new, until a reset.
In other words, it is advantageous to purchase upgrades as soon as you can.
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