I would say that this question have a lots of different answers to it, and all of these answers depends on these perspective you look at this question from.
There are a lots of things to keep in mind, things like ETFs, trading cost, commission etc.
Trading Costs do matter to active and high-volume traders and investors like you and I, and people Jordan Belfort. There are a lots of brokers now on days which offer you a commission-free trades of stocks together with ETFs.
In this one there are also other factors like access to a range of investments or training tools which might be very helpful to you when you are a beginner or don’t know much about investing yet. These tools and access to various things might even be more helpful and valuable than saving a few bucks when you actually buy stocks.
But also the cheapest brokers are for the most part the most trashiest, brokers are one of these things you don’t want to be sloppy with. Sometimes it is better to pay a little bit more and get something better.