Dear community, I need your advice all. so long story short I have a colleague in a private company where I work. I tell my first journey in this forum, how to get started, how to earn here and some other questions related to this forum.

When talking about earning without spending capital (money), frankly I say that to get free money on this forum by promoting a project or joining an Airdrop. I also say there is no guarantee after promoting a project can generate (money) for you. as I know that there are many types of fraudulent projects although not all projects end like that.

And My Friend has around $30k in capital and is planning to invest in crypto. I recommend BTC for the first choice and tell some of my current investments such as AXS, BNB and MATIC (I bought 3 altcoins when the price was low). other than that, AXS has reached its new ATH, while the last ATH for BNB and MATIC is around May.
My question is it safe to invest BTC at the current price?
Do you have any other Altcoin options?