Yes, $10k is a great amount to start investing, but you don't need to wait until you have $10k. Thanks to platforms like Public.com and Webull, you can invest in stocks and ETFs with just a few dollars. Fundrise allows anyone to invest in real estate with as little as $10. You'll have more options if you've got $10k to invest, but you certainly don't need to wait until you have that much saved before you start investing it.