Most consumers nowadays don't trust crypto assets just because they miss out most linked platforms to existing Fiat money. Fiat money is a currency without intrinsic value that has been established as money, often by government regulation.
One of the most spread out platforms for linking a bank account directly to crypto assets is:
Coinbase supports Stellar Lumens as well, that means if you're able to create an account and verify your ID you're ready to sell or buy any crypto asset for Fiat money through the Coinbase interface.
If you don't have a debit card or bank account that you can use for having Fiat money transactions you can make use of:
Wirex is a crypto based platform that offers Visa Electronics Debit Cards to supported country residents. All assets are tradeable and useable through their interface. Stellar Lumens are supported as well so trading assets and transferring the XLM to Stellar DEX can increase your LLion holdings.
Both of the mentioned platforms can be used to buy, hold and sell crypto assets. By creating a account and making the first transaction through it there is a 10€ bonus you will get credited to your wallet.
For a non-investment profit on crypto assets refer to:
Another way to buy Stellar Lumens ( XLM ) with Fiat money debit card: