Unity Action

Money.cs

using UnityEngine;
using UnityEngine.Events;

public class Money : MonoBehaviour
{
    [SerializeField] private int amount = 10000;
    public static UnityAction<int> OnGrabbed;
    
    public void Grab()
    {
        OnGrabbed.Invoke(amount);
        Destroy(gameObject);
        // TODO: A Player can only pick X amount
    }
}

MoneyHUD.cs

using System;
using TMPro;
using UnityEngine;

public class MoneyHUD : MonoBehaviour
{
    private TextMeshProUGUI moneyUI;
    private int money;

    void Start()
    {
        moneyUI = GetComponent<TextMeshProUGUI>();
        money = 0;
        moneyUI.SetText("" + 0);

        Money.OnGrabbed += OnMoneyGrabbed;
    }

    private void SetMoneyAmount(int amount)
    {
        moneyUI.SetText($"{Convert.ToDecimal(amount) / 100:#.00}");
    }

    private void OnMoneyGrabbed(int amount)
    {
        money += amount;
        SetMoneyAmount(money);
    }
}