Bugfix: eliminant coinbase bigdecimal crash (NMA-1426)

[HashEngineering]

Issue being fixed or feature implemented

There is a NumberFormatException crash when converting a localized decimal string to a BigDecimal. This will resolve that issue.

Related PR's and Dependencies

Screenshots / Videos

How Has This Been Tested?

• [ ] QA (Mobile Team)

Checklist:

• [ ] I have performed a self-review of my own code and added comments where necessary
• [ ] I have added or updated relevant unit/integration/functional/e2e tests