If someone invest small amount of money in Bitcoin because of curiosity, it's completely fine.
But if someone invest small amount of money in Bitcoin because the believe Bitcoin price will increase 10,000x in the next few years, it just a dream and they should learn how to make more money, not by investing in Bitcoin.
And from what I observed some newbies are investing small or big in Bitcoin without any knowledge or without even trying to learn the basics of Bitcoin like understanding how Bitcoin works.
It's a very no-no for me, even how big or small your investment is and without proper education or learning, it's overall bad.
They always rely on the short information they read then think about they know everything already on bitcoin investment that's why they stumble by taking wrong decision and realize that they made a wrong calculation on their investment. That's why that experience show us that we need deeper knowledge about bitcoin and its always good for us that we can read TA and have knowledge about DCA so that we can lower down the risk upon investing on bitcoin.
This doesn't mean that if you are small trader/investor you don't need to do this since it applicable on any investment sizes so better get more knowledge and skills before trying to take the risk especially if we are new.