Now my question is, is it good for my future that I have sold my altcoins and invested in bitcoins?
bitcoin has almost always been on an upward trend(if you check the price from the very beginning), so if you are planning on holding for a long period of time, bitcoin is a good choice to invest.
The trust wallet I put my invested bitcoins in, is the trust wallet safe for my bitcoins?[/size]
while trust wallet is popular, it is not as secure as you might think. I'd suggest moving your coins to an open-source wallet like Electrum (looking at the thread other members have suggested Electrum too) or better yet, use hard wallet to store your coins.
Trust Wallet is safer than any Centralized or Custodial Wallet. But as it's an open source wallet so it may not be fully secured as we don't know how the seeds are generated.
That's why you should choose non custodial closed source wallets like Electrum, Mycelium, Bitpay, Blue Wallet and Alpha Wallet. My suggestion is to use Electrum wallet which have exciting features too. Visit their official website to download wallet or to learn more
https://electrum.org/ Its available for Android, Windows, Mac OS , Linux and Python.
Hope you got your answer.
I think you've mixed up what open-source and closed-source wallets are.