public void BuyUgrade(IUpgrade itemToUpdate)
{
BigNumber updateCost = itemToUpdate.Price;
if (CanPay(updateCost) == false)
{
throw new InvalidExpressionException("Player profile dont't have enouth money to pay! Can't make transaction.");
}
_moneySystem.SubstructMoney(updateCost);
itemToUpdate.LvlUp();
}