You can not call Shiba Inu tokens a scam,
but overall they serve no real purpose in the cryptocurrency world. They are meme coins (Shitokens).These tokens are 100% premined and are made just to make the developers billionaires. These tokens are Pump and Dump. People buy them dreaming to make huge money in a very short time but in the end, only those lucky to board early (developers) will be on the receiving end.
You can't deny the fact that if this token has made early holder become millionaire or even billionaire. This is the fact. Some people able to make their dream but I can't deny there are also people lose their dream caused by shib. You'll be the one paying them. They hold no real value so they will go dead sooner or later. 
The time will tell and speculating about the future is not good for this time as it can change anytime. Know the basic difference between a token and a coin first. All of the tokens are on ETH and Binance smart chains. People don't know how easy it is to create these tokens and fall for the traps. They pay huge sums for advertising and creating fake hype.[/b]
I did know that if this token got big hype due to the elon musk and that's it but that already happened and at least shiba dev was doing what they could did.