fix: fiat value 0 due to slow connection

[vaibhavgarg237]

Describe the changes you have made in this PR

During loading due to a slow connection, fiatBalance is shown ~$0, so "..." will be shown when the user has some satsBalance but due to a network issue, fiatBalance is not fetched properly.

Link this PR to an issue [optional]

Fixes #1608

Type of change

(Remove other not matching type)

• fix: Bug fix (non-breaking change which fixes an issue)

How has this been tested?

As mentioned in the issue issue only reproduces due to slow connection, so I tested by hard coding values.

Checklist

• [x] My code follows the style guidelines of this project and performed a self-review of my own code
• [x] New and existing tests pass locally with my changes
• [x] I checked if I need to make corresponding changes to the documentation (and made those changes if needed)

[github-actions[bot]]

🚀 Thanks for the pull request!

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[escapedcat]

Closing this in favour of #1645
@vaibhavgarg237 thanks for starting this!