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.
Don't you tell your friends to learn about crypto before try to invest in crypto? this will better than let your friend to invest without any knowledge about that. At least he must not take wrong price as his entry point.
My question is it safe to invest BTC at the current price?
For bitcoin is yes as there was possibility for bitcoin to growth even more. The real competitor for bitcoin was gold and you can compare how much marketcap owned by bitcoin and gold. Bitcoin potentially to go to the 100k or even more. It's better to spend a few percents into the altcoin rather than putting all into the bitcoin.
Do you have any other Altcoin options?
You can try to pick top 50 coins or less. There's no guarantee for the instant profit. The only best coins to be catched with low market valuation.