BTC is the only reliable long term bet
BTC requires more money which we don't have available at the moment because BTC is very expensive on the situation if we invest in alt coins it can be more useful than BTC because it has more growth than BTC, the growth is often less in BTC because the trading volumes is so high .so first we should get benefit from alt coins but I hope that in the near future we can take advantage from alt coins and we would be able to buy BTC.
having BTC does not need to buy all at once by collecting more of your time. When you have some money ready to buy Bitcoin, you can do it gradually. do it consistently for a long time and you will see your Bitcoins grow quite a lot in your wallet.
more novice investors are thinking the same thing as what you say. but maybe that starts to discourage someone from trying to start investing in Bitcoin.