```html
body {
fontfamily: Arial, sansserif;
margin: 20px;
}
canvas {
mozuserselect: none;
webkituserselect: none;
msuserselect: none;
}
const ctx = document.getElementById('bitcoinChart').getContext('2d');
const bitcoinChart = new Chart(ctx, {
type: 'line',
data: {
labels: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'],
datasets: [{
label: 'Bitcoin Price (USD)',
data: [35000, 38000, 42000, 45000, 48000, 52000, 53000, 55000, 58000, 60000, 62000, 65000],
backgroundColor: 'rgba(255, 206, 86, 0.2)',
borderColor: 'rgba(255, 206, 86, 1)',
borderWidth: 1
}, {
label: 'Golden Cross',
data: [null, null, null, null, null, 50000, 51000, 53000, null, null, null, null],
backgroundColor: 'rgba(255, 159, 64, 0.2)',
borderColor: 'rgba(255, 159, 64, 1)',
borderWidth: 1,
pointRadius: 0,
borderDash: [10, 5]
}, {
label: 'Death Cross',
data: [null, null, null, null, null, null, null, null, 56000, 55000, 54000, null],
backgroundColor: 'rgba(255, 99, 132, 0.2)',
borderColor: 'rgba(255, 99, 132, 1)',
borderWidth: 1,
pointRadius: 0,
borderDash: [10, 5]
}]
},
options: {
scales: {
yAxes: [{
ticks: {
beginAtZero: false
}
}]
}
}
});