简述网络虚拟产品传统支付体系的种类。
（1）以传统银行为核心的网上支付系统。（2）由电信运营商提供的代收费（3）以PAYPAL为代表的第三方支付工具（4）收取会员费的方式
Complete the following sentence with a (compound) word derived from the one given in bracket.
So many people exhaust their health gaining wealth, and then have to spend their wealth to（ ）their health. (gain)
