Timvi Official has a 1By1 service that allows to exchange Ethereum (ETH) to Timvi (TMV) at the system's internal exchange rate. If you have your own internal exchanger does it mean that you do not need listing on the exchanges?
In principle, listing is not necessary since TMV can be exchanged for ETH and already ETH you can exchange anywhere. This is one of the most popular cryptocurrencies in the world.
But he certainly will not hurt. To date, most of the assets are on the exchanges and this is an integral part of the cryptocurrency industry. Therefore, listing for the recognition of the project will be very useful.
Since the TMV coin will be stable, that is, it will have approximately the same price, then trading manipulations should not affect it. And in order to find out about a coin, there are other ways besides listing. It even seems to me that if a coin can only be bought on the project platform, it can cause interest in it.
Perhaps you are right, that is, if coins can be purchased only on the platform of the project, then the price of the coin will certainly be stable since traders will not be able to shorten it.