Currently, I have found that web3auth.io and magic.link provide these kind of services, but I feel restricted in the way they force you to implement them in the front-end. Today I discovered hedgehog.audius.org, a package that provides wallets through username and password. Even though this library was the kind of thing I was looking for, it is 100% written in Javascript and does not provide types for Typescript... Source: almost 2 years ago

Seems like a solid strategy, give it a try on e.g., https://bitcoinflip.app [and learn that most such strategies will fail to give you any gains]. Source: almost 2 years ago

Here is one of the Bitcoin trading simulators (just took the first google result): https://bitcoinflip.app/ try to time the market and observe that you might be lucky a couple of times until - well, until you aren't. :). Source: about 2 years ago