Main.java

package org.example;

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        var scanner = new Scanner(System.in);

        System.out.println("What is BTC price today?");
        var rate = scanner.nextDouble();

        while (true) {
            System.out.println("How mush $ do you have?");
            var dollars = scanner.nextDouble();

            if (dollars == 0)
                break;

            var result = dollars / rate;
            System.out.println("Result = " + result);
        }
    }
}

Main2.java

package org.example;

import net.thauvin.erik.crypto.CryptoPrice;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) throws Exception {
        var scanner = new Scanner(System.in);

        //System.out.println("What is BTC price today?");
        //var rate = scanner.nextDouble();
        var rate = CryptoPrice.spotPrice("BTC");
        System.out.println("BTC price is " + rate.getAmount());

        while (true) {
            System.out.println("How mush $ do you have?");
            var dollars = scanner.nextDouble();

            if (dollars == 0)
                break;

            var result = dollars / rate.getAmount().doubleValue();
            System.out.println("Result = " + result);
        }
    }
}

pom.xml

    <dependencies>
        <dependency>
            <groupId>net.thauvin.erik</groupId>
            <artifactId>cryptoprice</artifactId>
            <version>1.0.0</version>
        </dependency>
    </dependencies>