We may be inclined to think about other coins, but in the end, BTC would be the main coin to hodl and watch for.
Simply due to the value and acknowledgment BTC gains now because of the ideas it upholds.
If you are considered other than Bitcoin, you can get a profit from that coin after a certain time after investing. But if you are holding a bitcoin, then you will benefit from that Bitcoin in the future. According to Bitcoin's popularity and acknowledgement, its value is gradually increasing in the future, which is reduced instead of increasing in other coins.