Hi!
Before adding few thoughts about the dapps you mentioned, i would like to know if you are willing to build all of them or just choosing which one will be developed according to community feedbacks?
1. The first dApp idea would be a crowdfunding app where you could create any number of campaigns, accept funds and withdraw them at any time. The goal would be providing a decentralized and censorship-resistant crowdfunding platform.
I think this may work only with traditional crowdfunding IPO (Initial Public Offering) if you are willing to lunch your own token. Otherwise, if you are willing to help crypto crowdfunding, no need to create a unique token for the dapp.
2. The second dApp would be an escrow market that puts together buyers, sellers and mediators. A seller willing to accept payments in ETH (or ERC-20 tokens) could agree with the buyer on a trusted mediator who would step in to help with any disputes. Mediators would have powers to refund the buyer or release funds to the seller depending the outcome and, as an incentive, they would charge a small fee. The dApp would also have a rating system where buyers, sellers and mediators can leave feedback among themselves.
A market for what in exact? I think this may work if the marketplace is for digital goods. An escrow system for physical goods marketplace requires a lot more settings and partnerships in addition to legal authorizations.
3. Third idea: a Tokenizer tool. The goal would be providing a way for people to create their own ERC20 tokens without any coding experience. These tokens could represent physical and digital goods. The tool would also deploy a simple platform where users could purchase these tokens from you and you'd be able to manage the token supply and withdraw any funds made from sales. The tool would also give you a plug-in to include in your website to allow direct purchases of your token. Finally, given the ERC20 nature, token holders -- people who bought the token from you -- could exchange them freely afterwards (peer-to-peer marketing) and you, as the token creator, could accept redemption of these tokens in exchange for the actual goods.
Why you focus only on ERC20 tokens? Ethereum virtual machine does this already.
In general, many companies try their best to compete with ethereum and avalanche in the smart-contract industry, it's not that easy to take part from the cake with them.
Better to provide more technical info so we can help you.
4. An Ethereum SmartWallet embedded with features like a testament tool (which would transfer the ownership of the wallet to your loved ones in case you die, together with other details you'd like them to see like passwords, crypto seeds, PIN numbers -- all encrypted from outside viewers), ability to deposit and transfer ERC-20 tokens and earn interest on these deposited assets.
Useless dapp. No one will think to share his private codes with others (even his closed) and can hold them in a secret place so we can find them if he dies.
5. Finally, a BettingHouse maker. With this tool, you'd be able to own a smart contract where you, as the owner, could propose events involving sports, crypto prices, elections, etc. with their potential outcomes (defined by you) and attract gamblers to place bets on these events. People who bet on the winning outcome would split the stake among them and you, as the house, you'd get a small fee made from all bets.
You can ask about this dapp in the Gambling section. users out there have better experience interacting with this kind of Dapps and may give you a help-hand.
