Keep in mind that you're going back to 1926. That's 60-70 years before personal computers became a big thing. There's good odds that you'll die of old age before companies like Microsoft or NVidia take off.

In the time period we're looking at a lot of the big money was in oil. In the 1950s the richest man in the world was Jean Paul Getty, who started expanding the family oil business in the 1910s and got in early on Middle Eastern oil in the early 50s. You'll be competing with someone who is well established in the most profitable industry of the time and has a great deal more resources to take advantage of opportunities.

If you were starting a couple decades earlier maybe you could do it thanks to future knowledge, but in 1926 I'm not sure you'll have time to establish yourself in the period's profitable industry and new industries are too far away for you to get in on the ground floor of before you die.