If you have money, then a token can easily being trade on decentralize exchange by providing Liquidity. Now most of project Spend money for making false papers, afterward get listed on any centralized exchange by fee what they required. I've been seeing such thing since a decade around. There is no lack of Scam projects, scamming us years. Just get listed on exchange with fund, creating hype then sold everything and run away. But some project use their money to being developed for long term for doing something helpful for world
Which is why people still prefer big centralised exchange when trading. Most scam coins are at decentralised exchange. While there are also scam coins in centralized exchange, they are less likely to be found on bigger centralized exchange.
Also, centralized exchange like Binance and Coinbase are as much as possible to follow government rules. So they will have stricter requirements when it comes to listing new coins.