USDT is something built on promises that you will always get $ 1 when you want to spend it, so you have to trust their promises if you choose to believe, It is better to choose central bank than the company behind that currency.
The success of your strategy varies, but I do not agree with 30٪ USDT. Here's what I suggested:

1. 40% Bitcoin: For long periods ranging from two weeks to several years based on the profits you want to collect.
2. 20% ETH: If you want to invest in tokens.
3. 10% Monero or Dash: The future of high-privacy currencies.
4. 30% for daily investment: Speculation between Gainers & Losers here ----> https://bitscreener.com