How do I get more money early in No Man's Sky? [duplicate]

The easiest and most cost effective way I've seen is by crafting and selling Bypass Chips. They only require 10 Plutonium and 10 Iron to craft and they sell for over 3k each. While it's a bit tedious you can wrack up a million credits in 20-30 mins of gathering/crafting and the required resources can be found on almost every planet.

Fastest way to make money when you need it versus relying on running into something worth more or trying to mess around with finding a good market.

Asteroid mining for materials like Copper, Nickel, and Gold can yield large amounts of money very quickly because you can mine the asteroids right near the space stations. Usually the larger size asteroids will have these materials, rather than the smaller asteroids that only have Thamium9.

Suspension fluid becomes trivial when you find the blueprint for it. Use the red beacons to search for the Colonial Outposts, break in (grenades or blaster) and solve the little puzzle inside to find it and other recipes. You can use the red beacons more than once, and the cost is only a bypass chip so you can locate several buildings of each type before heading out.

Gold and Emeril are great starter resources to sell. Alternatively if you get lucky and find a planet with gravitino balls, poison sacs, vortex cores, or aquaspheres collecting them up and selling on planet is the quickest way I've found to get units. They each take a slot, but generally sell for 20-30k units each, and are quite common on the planets when you find them. Bigger inventory capacity will make this more efficient as well.